--- configure.ac	(Asterisk 15.1.0)
+++ configure.ac	(working copy)
@@ -2523,6 +2523,7 @@
 if test "x$PBX_SRTP" = x1;
 then
     AST_EXT_LIB_CHECK([SRTP_256], [srtp2], [srtp_crypto_policy_set_aes_cm_256_hmac_sha1_80])
+    AST_EXT_LIB_CHECK([SRTP_192], [srtp2], [srtp_crypto_policy_set_aes_cm_192_hmac_sha1_80])
     AST_EXT_LIB_CHECK([SRTP_GCM], [srtp2], [srtp_crypto_policy_set_aes_gcm_128_8_auth])
     AST_EXT_LIB_CHECK([SRTP_SHUTDOWN], [srtp2], [srtp_shutdown], [srtp2/srtp.h])
 
--- res/srtp/srtp_compat.h	(Asterisk 15.1.0)
+++ res/srtp/srtp_compat.h	(working copy)
@@ -16,6 +16,18 @@
 #define crypto_policy_set_aes_gcm_128_8_auth srtp_crypto_policy_set_aes_gcm_128_8_auth
 #define crypto_policy_set_aes_gcm_256_8_auth srtp_crypto_policy_set_aes_gcm_256_8_auth
 
+#if defined(SRTP_AES_GCM_128_KEY_LEN_WSALT)
+#define AES_128_GCM_KEYSIZE_WSALT SRTP_AES_GCM_128_KEY_LEN_WSALT
+#else
+#define AES_128_GCM_KEYSIZE_WSALT SRTP_AES_128_GCM_KEYSIZE_WSALT
+#endif
+
+#if defined(SRTP_AES_GCM_256_KEY_LEN_WSALT)
+#define AES_256_GCM_KEYSIZE_WSALT SRTP_AES_GCM_256_KEY_LEN_WSALT
+#else
+#define AES_256_GCM_KEYSIZE_WSALT SRTP_AES_256_GCM_KEYSIZE_WSALT
+#endif
+
 #define err_status_t srtp_err_status_t
 #define err_status_ok srtp_err_status_ok
 #define err_status_fail srtp_err_status_fail